Potable water from properly constructed on-site water well must be tested for the following constituents at the testing frequency listed:
CONSTITUENT TESTING FREQUENCY EXPECTED RESULT
Total Coliform Bacteria Quarterly (once every 3 months)* Absent
Fecal Coliform Quarterly (once every 3 months)* Absent
Nitrate (NO3) Annually (once every year)* ≤ 45 mg/L
Nitrite (as nitrogen) Once every 3 years* ≤ 1.0 mg/L
Secondary Standards 1 At least once* Variable Fluoride At least once* ≤ 2.0 mg/L
¹Secondary MCL Standards (General mineral/physical): bicarbonate, carbonate, hydroxide alkalinity, calcium, iron, magnesium, manganese, pH, specific conductance, sodium, and total hardness. *Required testing frequency may vary depending on results.
There are no additional water sampling requirements for public, treated water supplies.